<template>
  <view>
    <my-search @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧滑动 -->
      <scroll-view scroll-y="true" class="left-scroll-view" :style="{height:wh+'px'}">
        <view :class="['left-scroll-view-item',i===active?'active':'']" v-for="(item,i) in cateList" :key="i" @click="activeChanged(i)">{{item.cat_name}}</view>
        
      </scroll-view>
      <!-- 右侧滑动 -->
      <scroll-view scroll-y="true" class="right-scroll-view" :style="{height:wh+'px'}" :scroll-top="scrollTop">
        <view v-for="(item2,i2) in cateList2" class="cate-lv2" :key="i2">
          <view class="cate-lv2-title">
            /{{item2.cat_name}}/
          </view>
          <view class="cate-lv3-list">
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodList(item3)">
              <image :src="item3.cat_icon.replace('dev','web')" ></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
        
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        wh:0,
        cateList:[],
        active:0,
        cateList2:[],
        scrollTop:0
      };
    },
    methods:{
      async getCateList(){
        const {data:res}=await uni.$http.get('/api/public/v1/categories')
        if(res.meta.status!==200){
          return uni.$showMsg()
        }
        this.cateList=res.message
        this.cateList2=res.message[0].children
      },
      activeChanged(i){
        this.active=i
        this.cateList2=this.cateList[i].children
        this.scrollTop=1-this.scrollTop
      },
      gotoGoodList(item){
        uni.navigateTo({
          url:`/subpkg/goods_list/goods_list?cid=${item.cat_id}`
        })
      },
      // 跳转搜索
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    },
    onLoad() {
      const sysInfo=uni.getSystemInfoSync()
      this.wh=sysInfo.windowHeight
      this.getCateList()
      
    }
  }
</script>

<style lang="scss">
  .scroll-view-container{
    display: flex;
    
    .left-scroll-view{
      width: 120px;
      .left-scroll-view-item{
        line-height: 60px;
        background-color: #f7f7f7;
        text-align: center;
        font-size: 12px;
        &.active{
          background-color: #fff;
          position: relative;
          &::before{
            content: '';
            display: block;
            position: absolute;
            left: 0;
            top: 50%;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            transform: translateY(-50%);
          }
        }
      }
    }
    .right-scroll-view{
      .cate-lv3-list{
        display: flex;
        flex-wrap: wrap;
        
        .cate-lv3-item{
          display: flex;
          flex-direction: column;
          width: 33.3%;
          margin-bottom: 10px;
          align-items: center;
          image{
            width: 60px;
            height: 60px;
          }
          text{
            font-size: 12px;
          }
        }
      }
      .cate-lv2-title{
        font-size: 12px;
        font-weight: bold;
        text-align: center;
        padding: 15px 0;
      }
    }
  }
</style>
